Mold.



H. M. BROOKFIELD 6L S. OLSEN.

MOLD.

APPLICATION FILED ocT.1. Isls.

3 SHEETS-SHEET l.

Patented June 29, 15H5.

III. I! If IIII j] IIII 2 I. mm. IIII. 2@ mm@ MOLD.

APPLICATIONFILED 0CT.1.1913.

Patented June 29, 1915.

3 SHEETS-SHEET 3.

naar avr-laaste MBSEY.

j Hanny m. BnooKrInLD am) siewenn olsen, or NEW Yemen. v., assmnons To @ne nnooxrmm) chess contraint, or NEW vomi, N. Y., A conronarion orrnnw amasar.

Specification of Letters Patent. Patmm Jun@ 29, 19,115i

Griginal application le. July 24, 1912, Serial No. 711,234. Divided and this application led October 1,

To all whom z't may concern: f

Be it known that we, HENRY M. BROOK- rmLD and SIG-varo OLsnN, citizens of the United States, residing at New York city, State of New York, have invented certain new andV useful Improvements in Molds, of

-which the following isa clear, full, and'- exact description.

This case is a division of a copenchng application, Serial No. 711,234, iled July 24, 1912.

The present invention relates particularly to molds'in which plastic articles may be formed.

A principal object of the invention 1s to produce a mold from which the molded Y article can be readily ejected.

A further object of the invention is insure reliability in the delivery of the article from vthe mold.

A general object of the invention isto produce a mold of very simple c'onstructlon having. advantageous and novel features The invention consists in the' generalcombination of parts and simplicity of details to be hereinafter described, all of lwhich ycontribute to produce an eicient mold.

A preferred embodiment of our invention Will be particularly described in the following specification While the broad scope of our invention willbe pointed out in the appended claims.

In the drawings, Figure 1 is a front elevation of a press with which our invention may be employed; Fig. 2 s a vertical section through the lower yportion of the press, illustrating the mannery in which the article isy formed in the mold and also illustrating the manner in which the iinished article can be ejected from the mold; Fig. 3 is'a plan showing one of' the molds in an open posi- 1 tion,` and Fig. 4 is a horizontal section 'through the lower part of the press.

Referring more particularly to theparts, 12 indicates the frame of the machine which may comprise a base plate 13, upon whic .a

table 14 is supported. The said table 14 isc preferably circular and the middle portionthereof is formed into a turn table 15, which may support a worm wheel 16, which may be rotated continuously by means of' a Worm 17 carried by shaft 18 and driven through gearing 19 from a main shaft 20, said gearing beingA driven directly through bevel Serial No. 792,746.

gears 21. At the side of the machine and supported on pulleys 22 there is preferably .provided a delivery belt 23, which may be p f/one of these molds is illustrated in Figs.

2 and 3. Each mold preferably comprises two separable side parts 29 which are pivotally connected at 30 and adapted to swing apart laterally. Each mold preferably comprises also a base 31, the outer portion of which forms a chamber 32 to rd'ceive the bottom part 33 of the mold. While the side parts 29 of the molds are adapted to swing away from each other in a horizontal plane, the bottom part or cup 33 is adapted to swing outwardly, preferably in a vertical plane, for which purpose it may be provided with an arm 34 attached on a horizontal pivot 35, said arm carrying a roller 36 at its outward extremity. Each mold is preferably provided with a latchor lock 37 in the form of a spring pressed trigger 38, having a hook 39 adapted to engage with a hook plate 40 on the opposite member, to holdthe side parts of the mold together, and directly over the bottom part 33, so that whenl the parts are together they form a complete mold to shape the exterior of the insulator or other article. The pivot pin 30 of the side parts has its lower end secured in the carrier 27 and may have its upper end secured in a bracket 41, as shown in Fir 2.

The bottom'part 33, of each mold nor- `mally rests'on a central adjusting' screw 33a held in plate 33".

After the mold is open as indicated in Fig. 3, the molded article can be ejected or delivered by automatic means coperating with the lever5 'Salland to be described hereinafter. f

\ `The machine preferably is formed with a central tubular post 42 which houses the upper part of thef' mainv shaft 20, and this post supports rotatably an; upper frame plate 43. Between the frame plate 43. and' the carrier 27 are provided a plurality of cross-head guides 44, between which verticon ` follower 50, each of said followers comprising a plug 51, preferably of conical form, which is attached on the underside thereof. Centrally disposed in each plug 51 there is a plunger 52 which passes down into the interior of the mold when the plug closes the mold so as to form a threaded interior in the molded article. if the article is an insulator such as indicated by 53 at the right of Fig. 2. In the operation of the machine after the insulator is formed, the plunger is withdrawn during a rotary movement which withdraws its threaded end from the interior of the insulator without injuring the -molded thread, and thereafter the follower rises and the plug also withdraws from the mold. The cross-.heads carrylrollers- 54 which roll on the upper side of the fixed cam 55 and this cam permits the cross-heads to descend at the proper times so that the followers may close their molds, as described above, but which will permit a limited upward movement..

In order to permit a cam 61 to open each mold at the proper moment, each mold is unlocked, and this may be accomplished as indicated in Fig. 4 by means of a pin 56 which projects upwardly from the table 14 in such a way as to strike the tails of the spring -latches or locks 38. As soon as a mold'is unlatched, it is pulled open automatically into the position shown in Fig. 3.

This may be accomplished in any 4suitable manner, such as by means of a cross-head 57, to which'links 58 are attached, the outer ends of said links being attached through spring connections 59 with lugs 60 on the sides of the side parts 29 of the mold. Each cross-head is pulled inwardly at the proper moment by means of the fixed cam 61 with which the inner end of each cross-head'51 is connected.

In order to deliver the'flnished article' automatically from the mold, the cam roller 37 on the lever 34 of the bottom part of the mold engages with a` cam or,cam rail 92, as indicated in Fig. 2, and this swings the bot` tom part 32 of the mold into an elevated position over the belt 23 and near a guide 62 which 0'uides the molded article down onto the beIt when it falls out. The ends of we prefer to provide an engaging 1ember for dislodging it. This engaging member may has/e the form of a yoke 66, the end of which projects into the path of the insulator. This yoke is preferably forme'd on a lever pivotally supported at 67 on one of the posts 63, and provided with a cam arm 68. This cam arm is adapted to be actuated in succession to dislodge the insulators, by pins 69 which may project radially from the guides 44. The yoke 66 may be counterweighted bya weight 70, which vnormally holds the yoke elevated.

In Fig. 1 the guide 62 is omitted to prevent it from hiding other parts of the mechanism.

After the molded article 65 is delivered,

the bottom part 33 of the mold falls back by gravity into its normal position, and soonv after 'this occurs the cam 61 forces out the cross-head of this mold and the spring latch or lock 38 snaps over the hook plate 40 so as to hold the mold closed preparatory 'to receiving the next measured amount of stock.

The general mode of operation of the machine will be brieliy reviewed. A measuredredetermined amount of stock, such as mo ten glass, is placed in one of the molds at the proper polnt on the machine, and as the carrier rotates, the cam ipermits the cross-head 45, corresponding to the lled mold, to descend. It will 'be understood that the cross-heads more than counterbalance the lweight of the counte'rwe'ights 47 and hence the cross-heads tend to descend. As the cross-head 45 descends, the plug 51 ofthe follower 50 closes the upper side of the mold. After the plunger has been withdrawn the mold is' unlatehed by the releasing pin- 56 which engages the' spring latch or lock 38 of the mold. The side parts 29 of the mold are then pulled apart by the opening cam 61, and as the rotation of thef mold-carrier continues, the bottom part 33 of the mold swings upwardly and substan- 'tially radially away from the axis of the mold and away from the axis of the ma-` chine through the action of the cam rail 92 so as to overturn and eject or deliver the molded article 65, which may be dislodged by the disengaging member or lYoke 66 andydeliveredv in an inverted position on the belt 23. v A i Although-'we have described the mold as employed onan automatic press, it understood tlu1t"\'vefare not limited in the use of the invention to presses but it may be ap-` plied to molds ofany kind or For any purpose. andoperating-imm any plastic substance or othcr'substanee capable of being molded. i r

It is understood that the embodiment of the invention described above is only one of the many embodiments the invention may `taire, and we therefore 4do not wish to be i limited in the practice of the invention nor y l in our claims to the .form orembodiment `f"described.

What we claim as new is ,i 1. 'A mold comprising a plurality of mov- I kable and separable parts arranged to receive fa. plastic substance and form an article l therefrom when closel together, a part of embrace the sides of the molded article and 1 said mold being constructed and varranged to to support the article while said part carthe purposes aforesaid.

ries said article from its position in the mold into overturned position', and a pivot for said part about which it may swing for ,i 2. A' mold comprising separable side members and a bottom having portions g adapted to engage the side of the molded 20y article in order that said bottom may carry the article from its position in the mold'into overturned position, a pivot 'for said bottom, and means for edecting the movement of the' bottom for the purposesaforesaid.

.3. A mold having separablesides and a cup-shaped bottom, adapted) to embrace a substantial portion of the article molded, and a. pivot for .the

. bottom outside the mold about which the bottom may swing bodily, when said. sides,y are separated, from its position in the mold; into a position to discharge: the molded article with the bottom side uppermost.

. 4. A mold comprising separable side members and a bottom having portions adaptedt to engage the side of the molded article order that said bottom may carry the article from its position in the mold into overturned position, a pivotor said bottoml outside said mold about which' the bottom may swing bodily for the purposes aforesaid,l and means for swinging said bottom.

5. A mold comprising separable side members and a bottom having portions adapted to engage the side of the molded article in order that said bottom may carry the article from its position njthe mold into.

overturned position, a pivotfor said bottom, and means coperating with said bottom for receiving and insuring the'delivery in inverted position at a point remote from said mold of the molded article discharged by said bottom.

6. A mold comprising' separable side membersand a bottom adapted to receive a plastic substance and form an article therefrom, said bottom having a rounded cup-shaped cavity adapted to embrace a subsaid bottom beingy stantial portion of the side of the article to be molded whereby it may be swung to deliver said article in inverted position, and being pivoted outside said mold for this purpose, means for swinging said bottom, and a guide for receiving said article and p insuring its delivery to a receiving surface in inverted position.

7. A mold comprising separable side members and a bottom having portions adapted to engage the side of the molded article in order that said bottom may carry the article from its position in the mold into overturned position, a ivot for said bottom, means for eiiecting t e movement of the bottom for the purposes aforesaid, and means for dislodging the article from said bottom when said bottom has brought the article into overturned position. Y

8. In a press for molding articles, in combin'ation, a movable carrier having a plurality of. molds mounted thereon, each mold comprising laterally swinging side parts and an upwardly swinging bottom part, all

arranged to form an article when closed, means for automatically opening and closing said parts as said carrier moves, said bottom part acting to deliver the formed article in inverted positionat the delivery point at one side of said mold when said parts are opened, and an engaging member mounted adjacent said carrier and actuated thereby to prevent the molded articles from being carried beyond the delivery point.

9. In a`glass pressing machine 1n combination,a rotatable .carrier having a plurality Y of molds mounted thereon, each mold comprising horizontally swinging side parts and a vertically swinging bottom Zpart, all ar-I day of September 1913.

HENRY M. BROOKFIELD. SIGWARD OLSEN.

Witnesses: F. D. AMMEN, F. JACKSON.

It is hereby certified that in Letters Patent No.- '1,144,527, granted June 29, 1915',

upon the lapplication of Henry M. Brookield' and Sigwerd Olsen, of New York7 N. Y., for an improvement in Mo1ds, errors aiipear in the `printed specification requiring correction as followe: Page *2,v1ine 47, for the reference-numeral 51 reed o7; page 3, line 9, for the Word .closel read clos-eck! and that the said Lettere Patent `should be read with these corrections therein that there-ame niy conform to the record of the case in the' Patent Office. v

Signed end sealed this 27th dey of July, A. D., 1915. v v

` R. F. WHITEHEAD, u y

[SEAL] Acting Commissioner'of Patents. 

